Parasitoid-induced mortality of Araneus omnicolor (Araneae, Araneidae) by Hymenoepimecis sp. (Hymenoptera, Ichneumonidae) in southeastern Brazil

Abstract

All species included in the Polysphincta genus-group develop as ectophagous parasitoids of active spiders, killing their hosts prior to pupation. However, little information regarding natural history and ovipositing behavior of most species are available. In this study we inspected 85 webs of Araneus omnicolor to evaluate the frequency of parasitism and host size preferences of the wasp Hymenoepimecis sp. We also described the web characteristics of normal and parasitized spiders and the wasp ovipositing behavior. About 41% of the adult females of A. omnicolor inspected were parasitized. The highest incidence of parasitism was observed among relatively small females while no egg or larva was found in large individuals. Araneus omnicolor builds a strong web composed of an orb and barrier threads, where the spider rests within a curled leaf. The parasitoid larva builds its cocoon within this refuge, and modified cocoon webs were not observed. The ovipositing behavior of Hymenoepimecis sp. was very similar to that of Hymenoepimecis argyraphaga parasitizing Leucauge argyra, including the position of the sting, the killing of a previously attached larva, and the expelling of the egg from the base of the ovipositor.

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References

  1. Blackledge TA, Coddington JA, Gillespie RG (2003) Are three-dimensional spider webs defensive adaptations? Ecol Lett 6:13–18

    Article  Google Scholar 

  2. Dubois J, Rollard C, Villemant C, Gauld ID (2002) The phylogenetic position of parasitoids of spiders within Pimplinae (Hymenoptera, Ichneumonidae). In: Samu F, Szinetár Cs (eds) Proceedings of the 20th European Colloquium of Arachnology. Plant Protection Institute and Berzsenyi College, Budapest, pp 27–35

  3. Eberhard WG (2000a) The natural history and behavior of Hymenoepimecis argyraphaga (Hymenoptera: Ichneumonidae) a parasitoid of Plesiometa argyra (Araneae: Tetragnathidae). J Hymenopt Res 9:220–240

    Google Scholar 

  4. Eberhard WG (2000b) Spider manipulation by a wasp larva. Nature 406:255–256

    PubMed  Article  CAS  Google Scholar 

  5. Eberhard WG (2001) Under the influence: webs and building behavior of Plesiometa argyra (Araneae, Tetragnathidae) when parasitized by Hymenoepimecis argyraphaga (Hymenoptera, Ichneumonidae). J Arachnol 29:354–366

    Article  Google Scholar 

  6. Fincke OM, Higgins L, Rojas E (1990) Parasitism of Nephila clavipes (Araneae, Tetragnathidae) by an ichneumonid (Hymenoptera, Polysphinctini) in Panama. J Arachnol 18:321–329

    Google Scholar 

  7. Fitton MG, Shaw MR, Austin AD (1987) The Hymenoptera associated with spiders in Europe. Zool J Linn Soc 90:65–93

    Google Scholar 

  8. Gauld I (2000) The re-definition of pimpline genus Hymenoepimecis (Hymenoptera: Ichneumonidae) with a description of a plesiomorphic new Costa Rican species. J Hymenopt Res 9:213–219

    Google Scholar 

  9. Gauld ID, Dubois J (2006) Phylogeny of the Polysphincta group of genera (Hymenoptera: Ichneumonidae; Pimplinae): a taxonomic revision of spider ectoparasitoids. Syst Entomol 31(3):529–564 DOI 10.1111/j.1365-3113.2006.00334.x

    Article  Google Scholar 

  10. Levi HW (1991) The Neotropical and Mexican species of the orb-weaver genera Araneus, Dubiepeira, and Aculepeira (Araneae: Araneidae). Bull Mus Comp Zool 152:167–315

    Google Scholar 

  11. Rehnberg BG (1987) Selection of the spider prey by Trypoxylon politum (Say) (Hymenoptera: Sphecidae). Can Entomol 119:189–194

    Article  Google Scholar 

  12. Tolbert WW (1975) Predator avoidance behavior and web defensive structures in the orb weavers Argiope aurantia and Argiope trifasciata (Araneae, Araneidae). Psyche 82:29–52

    Article  Google Scholar 

  13. Townes H (1969) The genera of Ichneumonidae, part 1. Mem Am Entomol Inst 11:1–300

    Google Scholar 

  14. Wahl DB, Gauld ID (1998) The cladistics and higher classification of the Pimpliformes (Hymenoptera: Ichneumonidae). Syst Entomol 23:265–298

    Article  Google Scholar 

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Acknowledgements

This work was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (proc. 04/06072-4 to M.O. Gonzaga) and Fundação Mary Brown (research grant to J.F. Sobczak). We would like to thank Helena C. Onody for the identification of Hymenoepimecis sp. and Adalberto J. Santos, Cristina A. Rheims, and Natália O. Leiner for suggestions on the first version of the manuscript. This study complies with the current laws of Brazil.

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Correspondence to Marcelo O. Gonzaga.

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Gonzaga, M.O., Sobczak, J.F. Parasitoid-induced mortality of Araneus omnicolor (Araneae, Araneidae) by Hymenoepimecis sp. (Hymenoptera, Ichneumonidae) in southeastern Brazil. Naturwissenschaften 94, 223–227 (2007). https://doi.org/10.1007/s00114-006-0177-z

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Keywords

  • Ovipositing behavior
  • Araneus omnicolor
  • Hymenoepimecis sp.